Stop motion for yarn winding machines



NOV. 1966 J. B. CHAVIS 3,282,517

STOP MOTION FOR YARN WINDING MACHINES Filed July 23, 1964 5 Sheets-Sheet 1 IN VENTOR JULIAN B. CHAVIS Nov. 1, 1966 J. B. CHAVIS 3,282,517

STOP MOTION FOR YARN WINDING MACHINES Filed July 23. 1964 5 Sheets-Sheet 2 Nov. 1, 1966 J. B. CHAVIS 35282517 STOP MOTION FOR YARN WINDING MACHINES Filed July 23, 1964 5 Sheets-Sheet 5 j INVENTOR United States Patent Ofiice 3,2825 1 7 Patented Nov. 1, 1966 3,282,517 STOP MOTION FOR YARN WINDING MACHINES Julian B. Chavis, Box 939, Gastonia, N.C. Filed July 23, 1964, Ser. No. 384,627 2 Claims. (Cl. 242-37) This invention relates to a stop motion for a winding machine, and, more particularly, to a stop motion for a Foster 102 winding machine.

Machines of this type, known as quick traverse winders, are used for winding rather large cone-shaped packages of yarn wherein a yarn traverse is used to lag the yarn in the well-known cross wind or Fiji wind. In the type of machine identified as the Foster Machine, the yarn traverse is by means of a pair of oppositely directed intersecting grooves helically formed on the surface of a drum, which drum also frictionally drives the yarn package for winding the yarn.

In machines of this general type, there is usually a plurality of packages being wound, and it is desirable to stop the operation of winding of a single package when the supply of yarn to that package is interrupted, either by exhaust or by rupture. Such devices, often called knock-offs, stop the operation of a single winding spindle by removing the package from frictional contact with the winding and traverse drum or cam upon the absence of a yarn supply. A detector engages the yarn in its passage from a source to the winding package to permit normal operation of the machine. Upon exhaust or rupture of the traveling yarn, the detector moves to put into operation the stop device or knock-off.

Accordingly, an object of this invention is the provision of an improved knock-ofi means to be applied to a Foster 102 winder.

Another object of this invention is the provision of a knock-oif'operated by a constantly rotating multi-lobed cam acting upon a portion of the detector upon failure of the yarn supply.

Still another object of this invention is the provision of a spring operated knock-off, for a winding machine, released by a constantly rotating multi-lobed cam engaging a part of the detector means upon any failure of a yarn through either rupture or exhaust.

An additional object of this invention is to increase the speed of winding by employing a light weight combination friction and traversing drum formed of a suitable thermosetting material.

Other objects and advantages will become apparent upon consideration of the following specification taken with the accompanying drawings which together form a complete disclosure of my invention.

In the drawings, wherein like characters of reference indicate like parts throughout the several views:

FIG. 1 is an end view, partially in section, showing the normal operating position of the winder and the position taken by the detector upon yarn failure;

FIG. 2 is a similar view showing in dotted lines the position taken by the detector upon yarn failure and in full lines the position of the detector upon activation of the knock-off, the other parts being shown in full lines in knock-off position;

FIG. 3 is a similar view showing the resetting operation and FIG. 4 is a partial front view showing the novel cam drum.

Turning now to FIG. 1, the winder comprises a suitable frame, a portion of which is shown at 11. The frame 11 supports a constantly driven drum or cam 12 which normally rotates the yarn package 13, being wound on the sleeve or cone 14, by frictional contact therewith. The sleeve 14 is mounted on a cone 15 rotatably mounted on a hub 16 carried by the arm 17 which in turn is adjustably mounted on an arm 18. The arm 18 is mounted at its end in a clamp 19 carried by a lever 20, pivoted at knuckle 21 on the frame of the machine in a known manner. The yarn Y travels from a source of supply to the helical grooves formed in the face of the cam 12 and thus onto the cone 14 in a known manner. Suitable tension is maintained to keep the yarn taut in its path of travel to the cone 14.

A detector means 22 bears at its outer end against the yarn Y, and has an abutment 23 carried on a rearward extension thereof. The abutment portion 23 is rotatably mounted on a rod 24 which in turn is mounted on a latch 25 by means of a pin 26. The latch 25 is pivotally supported on the frame 11 by means of the pin 27 best shown in FIG. 4. The detector means 22 is counter-balanced by a weight 28 adjustably mounted on a rod 29 extending rearwardly from the abutment portion 23 to over-balance the same on yarn failure. A four armed lever 30 having arms 31, 32, 33 and 34 is adapted to pivot about pin 35 on the frame 11. A spring means 36 connects the arm 33 with a point 37 on the latch 25, above the pivot 27. Another spring shown at 38 also connects the arm 33 with the bearing stand 39. A lug 40 adjustably mounted on the latch 25 by means of the stop pin 41 holds the parts in their normally operative position by engagement over the pin 42 which offstands from the arm 31 of the lever 30. A finger piece 43 is formed on the outer end of the arm 31 for operating the lever 30 for resetting the ma chine for normal operation and this will be understood as the description progresses.

A constantly rotated multi-lobed cam 44, having in the present instance, three lobes 45, 46 and 47, is rotatably mounted adjacent the abutment 23. A dog 48 is mounted on the lower end of the arm 32 of the lever 30 to engage the depending teeth 49 of the elongated rack bar 50. The rack bar 50 is pivoted on the lever 20 about pin 51 and is urged in a downward direction, as best shown in FIG. 1, by means of the spring 52 connected between the opening 53 in the outer free end of the rack bar 50 and the offstanding ear or lug 54 carried on the lever 20. A loop or hook 55 is mounted at the free end of the arm 34 of the lever 30 for a purpose later to appear.

When a yarn Y breaks or becomes exhausted, the detector means 22 rises to the position of FIG. 1, so that the abutment portion 23 may be contacted by a lobe such as 46 of the cam 44. At this time by referring to FIG. 2 it will be observed that this contact drives the abutment and the latch to the right as shown in this view so that the lug 40 clears the pin 42 and allows the spring 38 to pull the arm 33 to the right as shown in FIG. 2. The arm 32 moves to the left, as shown in FIG. 2, and by means of the dog 48 moves the rack bar 50 to the left, rocking the lever 20 clockwise, as shown in FIG. 2, and lifting the package 13 off the cam 12, to the position shown in FIG. 2. The winding operation of the particular spindle 16 is now stopped, while other spindles on the machine are still operating.

For restarting, the parts are as shown in FIG. 2, and the knob 43 occupies the dotted line position of FIG. 3. Only this fragmentary position is shown here in order to reveal the relation to other motions. When the yarn Y is pieced-up or a new supply is positioned in place, and connected to the old yarn, winding may be started by depressing the knob 43 and therethrough lever 31 to the dot-dash line position. This brings the pin 42 below the lug 40 (see FIGS. 1 and 3) and the spring 36 tends to swing the arm 24 clockwise as shown in these figures. This movement also overcomes the resistance of the spring 38 and causes the lever 20 to rotate counter-clockwise, as shown in these figures, to lower the package 13 onto the cam 12. The counter-clockwise rotation of the lever 20 is permitted by the loop or hook 55 lifting the rack bar 50 away from the dog 48, as shown by the dot-dash line position in FIG. 3. Thus, as the Winding starts, pressure is exerted on the knob 43 until the stretch of yarn Y, passing from the supply to the package on the cone 15, is taut. In this condition the detector means 22 will not trip the knock-off, and winding can continue in a normal manner. When pressure on tthe knob 43 is released, the lever 30 and the parts operated by it return to the position shown in FIG. 1 and in solid lines in FIG. 3 until the occurrence of another failure in the yarn Y.

It has been found that by making the cam 12 of the light weight material, such as a well-known thermosetting resin, preferably a phenolic condensation product known as Bakelite, the speed of winding can be materially increased.

The cam 12 is fixedly mounted on a shaft 56 suitably mounted on the frame 11. The shaft 56 is rotated by suitable connections with the machine drive elements in a known manner. The shaft 56 may extend the length of the machine and it may have a plurality of cam drums 55 mounted thereon.

Having described the invention in a preferred form, it is to be understood that departures from the specific arrangement, shown and described, may be made within the skill of the art and the scope of the appended claims.

That which I claim is:

1. In a quick traverse winding machine having a frame and a plurality of Winding units mounted thereon, each winding unit including a holder having a winding package thereon and a cam drum rotating said package by frictional engagement therewith, means for stopping the operation of a single Winding unit comprising an integral fourarme-d lever pivoted on said frame, latch means pivoted on said frame, a stop pin on a first arm of said tour-armed lever, an adjustable stop on said latch means, spring means connecting said latch means and a second arm of said four-armed lever to hold said stop in engagement with said stop pin, a continuously rotating cam, 21 yarn fault detector rotatably mounted on said latch means, an abutment on said detector intermediate the ends thereof, whereby yarn failure causes said detector to move upwardly, bringing said abutment into engagement with said rotating cam, engagement of said rotating cam with said abutment causing said latch means to pivot, thereby disengaging said stop and stop pin, a rock frame carrying said package and holder, means connecting said rock frame and the third arm of said four-armed lever, spring means connecting said frame and said second-named arm of said four-armed lever for causing said third arm to move said connecting means to operate said rock frame upon disengagement of said stop and stop pin, means on said fourth arm of said four-armed lever for releasing said connecting means from said third arm, and a finger piece on said first arm of said four-armed lever for operating said lever to restore the parts to winding position.

2. The structure as defined in claim 1, wherein the means connecting the rock frame and the third arm of said four-armed lever comprises a rack bar pivotally mounted on said rock frame having teeth thereon adjacent its free end, said third arm of said four-armed lever including a dog thereon for engaging said teeth to move said rack bar longitudinally.

References Cited by the Examiner UNITED STATES PATENTS 686,826 11/1901 Mullers 24237 1,326,088 12/1919 Parks 242-43 1,836,105 12/1931 Bood 242-43.2 1,918,210 7/1933 McKean 34343.2 1,958,060 5/ 1934 McKean 24237 1,992,757 2/ 1935 McKean 24243 2,134,018 10/1938 Alderman 24237 2,184,723 12/1939 Parks 24243.2 2,665,077 1/1954 Stange 24237 STANLEY N. GILREATH, Primary Examiner. 

1. IN A QUICK TRANSVERSE WINDING MACHINE HAVING A FRAME AND A PLURALITY OF WINDING UNITS MOUNTED THEREON, EACH WINDING UNTI INCLUDING A HOLDER HAVING A WINDING PACKAGE THEREON AND A CAM DRUM ROTATING SAID PACKAGE BY FRICTIONAL ENGAGEMENT THEREWITH, MEANS FOR STOPPING THE OPERATION OF A SINGLE WINDING UNIT COMPRISING AN INTEGRAL FOURARMED LEVER PIVOTED ON SAID FRAME, LATCH MEANS PIVOTED ON SAID FRAME, A STOP PIN ON A FIRST ARM OF SAID FOUR-ARMED LEVER, AN ADJUSTABLE STOP ON SAID LATCH MEANS, SPRING MEANS CONNECTING SAID LATCH MEANS AND A SECOND ARM OF SAID FOUR-ARMED LEVER TO HOLD SAID STOP IN ENGAGEMENT WITH SAID STOP PIN, A CONTINUOUSLY ROTATING CAM, A YARN FAULT DETECTOR ROTATABLY MOUNTED ON SAID LATCH MEANS, AND ABUTMENT ON SAID DETECTOR INTERMEDIATE THE ENDS THEREOF, WHEREBY YARN FAILURE CAUSES SAID DETECTORS TO MOVE UPWARDLY, BRINGING SAID ABUTMENT INTO ENGAGEMENT WITH SAID ROTATING CAM, ENGAGEMENT OF SAID ROTATING CAM WITH SAID ABUTMENT CAUSING SAID LATCH MEANS TO PIVOT, THEREBY DISENGAGING SAID STOP AND STOP PIN, A ROCK FRAME CARRYING SAID PACKAGE AND HOLDER, MEANS CONNECTING SAID ROCK FRAME AND THE THIRD ARM OF SAID FOUR-ARMED LEVER, SPRING 